Sorry. I check my conf file again, I found wayland has disabled by "/etc/gdm3/custom.conf". After I edit "WaylandEnable" parameter in "/etc/gdm3/custom.conf", the icon showed up on gdm3.
-- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gdm3 in Ubuntu. https://bugs.launchpad.net/bugs/2017956 Title: Display Server Preference Icon does not show up in gdm3. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/2017956/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
